The savanna savannah A medium energy Biome Grassland

The savanna (savannah) A medium energy Biome (Grassland Biome)

About. . . • Defined as a Grassland Biome, where trees are spaced enough as to ensure there is no closed canopy. • The open canopy means a lot of sunlight hits the ground, resulting in thriving grass growth. – The predominant vegetation consists of grasses and forbs (small broad-leaved plants) • Elephant grass • Savannas cover 20% of the globe not including oceans • Sometimes classified as a forest and can be thought of as an underdeveloped rainforest.

Where!

climate • Seasons – Hot, wet, high-sun – Hot, dry, low-sun • Allot of sunshine all year round, seasonal fires, and October generally brings a thunderstorm with some wind that signals the beginning of the dry season. • annual rainfall is from about 50. 8 to 127 cm per year • If the rain were evenly distributed throughout the year, the grassland would likely become a tropical rainforest.

Soil • The soil of the savanna is porous, with rapid drainage of water. • Thin layer of humus (similar to the tropical rainforest) • Some savannas (such as in Kenya) the soil is so thin that trees only grow on termite mounds. Aka Grouped-tree savannas

Forms of human impact on the savanna • • • Fire management Grazing Tree clearing Foreign plants Climate change

Fire management • The savannas are subjected regularly to human use of fire – Creates a dominance of fire resistant trees and plants – Older trees generally survive, but saplings don’t • Forest will not recover

Grazing • Open canopy forests are ideal for herbaceous (grass) growth. This makes grasslands a desired location for grazing. • The removal of grass tends to reduce the competition between grass and trees, resulting in boosted tree growth, and damaging the balance of the savannah.

Tree clearing • Trees are being cleared for further grazing, also in order to reduce the tree dominance caused by grazing. – Improves quality and quantity of feed available for livestock in a short term solution. (then move on to clear more forest) • Slash and burn is commonly used

Foreign plants • Many foreign plants are categorized as environmental weeds. – Damaging and competing with the native species. • Permanently changes the ecosystem of a savanna.

sources • http: //www. ucmp. berkeley. edu/exhibits/bio mes/grasslands. php • wikipaedia